Aux input connection for Sound 20

[GeorgeCaveney]

Hi Merc fans.
I want to run an aux input (3.5mm jack for audio) to the stereo in my 2006 Vito, which has the original Sound 20 stereo (which is actually pretty good sound-wise).
Found this on Amazon, and just want to check the compatibility. It's a three-pin clip-in on the rear, and I'm pretty sure it's the right one. Just asking if anyone can confirm or deny!

Many thanks,
George

 

[GeorgeCaveney]

The answers to my question is as follows:
YES.

As you were.
Oh, you were already.